Microsoft Corporation (NASDAQ:MSFT) has announced the release date of Windows Phone 8.1, which will be available as an upgrade for Windows Phone users. The new mobile operating system update will have the Cortana voice-based virtual assistant. Microsoft said that the Windows Phone 8.1 update will be releasing on June 24th and it will be supported for three years until July 11, 2017.

“Microsoft will make updates available for the Operating System, including security updates, for a minimum of 36 months after the lifecycle start date,” said Microsoft in a note. “These updates will be incremental, with each update built on the update that preceded it. Customers need to install each update in order to remain supported. The distribution of these incremental updates may be controlled by the mobile operator or the phone manufacturer from which you purchased your phone, and installation will require that your phone have any prior updates. Update availability will also vary by country, region, and hardware capabilities.”

Windows Phone 8.1 was announced in early April at the Microsoft Build conference along with new Nokia Lumia handsets that will have Windows Phone 8.1 built-in at the launch.